| Title |
Piezoelectric Properties of lead free (Na0.44K0.52)Nb0.84O3-Li0.04(Sb0.06Ta0.1)O3 Ceramics with ZnO Addition |
| Authors |
이동현(Lee, Dong-Hyun) ; 이승환(Lee, Seung-Hwan) ; 남성필(Nam, Sun-Pill) ; 이영희(Lee, Young-Hie) |
| Keywords |
Piezoelectric properties ; Lead-free ; ZnO addition ; Dielectric properties |
| Abstract |
Electrical and structural properties were investigated on the effects of ZnO and the lead-free NKN-LST ceramics with the addition of ZnO were fabricated by a conventional mixed oxide method. A gradual change in the crystal and microstructure was observed with the increase of ZnO addition. For the NKN-LST-ZnO ceramics sintered at 1050°C, bulk density increased with the addition of ZnO and showed maximum value at addition 2.0mol% of ZnO. Curie temperature of the NKN-LST-ZnO ceramics slightly decreased with adding ZnO. The dielectric constant, piezoelectric constant (d_{33}) and electromechanical coupling factor (k_p) increased at the small amount of ZnO addition, which might be due to the increase in density. The high piezoelectric properties = 153 pC/N, electromechanical coupling factor = 0.484 and dielectric constant = 2883 were obtained for the NKN-LST+0.5ZnO ceramics sintered at 1050°C for 2h. |